Take-off device for looms



Patented Aug. 25, 1936 UNITED STATES PATENT OFFICE TAKE-OFF DEVICE FOR LOOMS William Simmons. New York, N. Y.

Application April 29, 1935, Serial No. 18,907

1 Claim.

This invention relates to take-off devices for use in conjunction with the take-up rollers of cloth weaving looms, particularly such looms upon which double pile fabric is woven.

A great deal of trouble is experienced at the take-up rolls of looms due to the tendency of the product to wind up on the same; when this happens, the loom must be stopped until the trouble is rectified, with a resulting loss of time. Moreover, the fabric is often damaged in correcting the trouble on account of the operators haste, and especially so when the take-up roller is provided with radial pins on its periphery, the pins frequently tearing the product. The trouble mentioned is aggravated in the Weaving of pile fabrics, which are woven double and then split by means of a knife; in such weaving there are two take-up rolls, one for each of the fabrics after splitting or cutting. It often happens that one of the split parts of the product will continue to wind around its roll at a time when the other is running as it should. The part which continues to wind on its roll increases the virtual diameter of that roll and produces a tension greater than normal and thus an unbalance in the tensions of the split pieces, which tensions should be equal, otherwise the knife employed to split the fabric, in cutting the pile, will cut the latter unevenly, and more on one side than on the other. My invention eliminates the foregoing difiiculties and thus saves time, and, what is more important, prevents damage to the product.

A further object of my invention is to provide an eflicient take-off device which may be used with equal facility on the various take-up rollers now in use by which to dependably engage the underside of the fabric issuing from the loom and to assure the positive and uniform operation of the take-off mechanism.

The invention will be fully and comprehensively understood from a consideration of the following detailed description when read in connection with the accompanying drawing which forms part of the application, with the understanding, however, that the improvement is capable of extended application and is not confined to the exact showing of the drawing nor to the precise construction described and, therefore, such changes. and modifications may be made therein as do not affect the spirit of the invention nor exceed the scope thereof as expressed in the appended claim.

In the drawing:

Fig. 1 is a side elevational diagrammatic view with parts in section of a typical double pile fabric weaving loom and incorporating my improved take-off device.

Fig. 2 is an enlarged side elevational view of my take-off device apart from the loom; and

Fig. 3 is a view similar to Fig. 2 but illustrating a modified form of my device.

Referring now to the drawing for a more detailed description thereof and particularly to Fig.

1 which illustrates diagrammatically a typical double pile fabric loom, the numeral 4 indicates a warp beam from which is fed the warp threads 5 or the fabric which pass over a guide rod 6 to be fed into the weaving mechanism 1 of the loom. Since the method of weaving double pile fabric is well known to those skilled in the art a detailed description of same is not required. It will however be of assistance to note that as the warp threads pass thru the mechanism 1 other yarn is fed to the machine to form the pile of the fabric which is secured by weaving to the foundation of same in cooperation with the action of the reciprocating shuttle. The double pile fabric thus woven is fed thru a pair of guide bars 8. It is to be noted here that the product at this stage of the process comprises upper and lower fabric foundations which are connected by the pile threads 9 which, as the product issues from the bars 8, are severed by the knife l0 into two separate pile fabrics II.

In order that the resultant fabrics be uniformly severed by the knife ID a uniform tension is applied to the fabrics II by the take-up rollers l2, the peripheries of which are provided with radial pins l3 which engage in the foundation of the fabric.

To assure the positive disengagement of the fabric from the pins l3 a belt I4 (see Fig. 2) is provided, which preferably extends the entire length of the roller l2. An idler roller [5 suitably journalled in the loom frame is arranged with its axis parallel to the roller l2 so as to cause the belt M to leave and return to the periphery of the roller I2 on tangential lines. The belt l4 may be made of a loose woven fabric or other suitable material so as to permit the piercing of the pins l3 thru same, which pins project thru the outer surface of the belt !4 a suflicient length to adequately engage the fabric. As the fabric moves around the roller l2 to the point H5 at which it is to be disengaged from same, the tangential path of the belt I l assures the positive disengagement of the fabric from the pins l3. From the point l6 of the roller l2 the fabric is fed to a receiving roll.

Reference is now directed to the modified form of my take-off device illustrated in Fig. 3 in which the numeral l1 indicates a suitable take-up roller, to the periphery of which is aifixed a sandpaper or other suitable rough surface iii. A take-01f belt l9 travels on the roller [1 and is of a length sufficient to permit same to travel in a path substantially as illustrated. The belt l9 in this form is to be constructed of a suitably resilient material such as pliable leather or rubber, the outer surface of which is provided with a carborundum coating or is otherwise suitably roughened to assure the frictional engagement with both the roller I! and the woven fabric -20. In order that the belt I 9 may grip the major portion of the periphery of the roller I! an idler roller 2| is suitably arranged and is carried on a spring arm 22, which arm is so tensioned as to urge the roller 2| radially toward the axis of the roller 11. The spring arm 22 is suitably supported on the loom frame 23. The fabric 20 as it approaches the roller H is under tension so as to cause the belt 19 to travel on a tangential line toward the roller I'I. As the fabric 20 moves around the roller H on the belt I9 to the point of discharge 24 the tangential path of the belt I!) resulting from the resilience of same and also the arrangement of the idler roller 2| causes the fabric to leave the takeoff mechanism in a tangential direction.

It will be apparent that the modified form of my take-off device shown in Fig. 3 may be used with equal facility in cooperation with a takeoff roller provided with radial pins projecting from its surface, as shown in Fig. 2, in which instance the function of the belt I9 as described will assure the positive disengagement of the fabric from the pins.

What is claimed as new is:

In a. loom, the combination with a take-up roller having a plurality of radial pins for engagement with the fabric, an idler roller mounted in close proximity to said take-up roller, an endless belt thru which the pins of said take-up roller are adapted to pass and engage the fabric, said belt being extended around said take-up roller and over said idler roller to assure the positive disengagement of the fabric from the pins thereby preventing said fabricfrom winding completely around the roller.

WILLIAM SIMMONS. 

